NPreprocess HTML, JavaScript, and other files with directives based off custom or environment configuration.
Its ported from preprocess to run with .Net framework.
<head>
<title>Your App
<!-- @if NODE_ENV='production' -->
<script src="some/production/lib/like/analytics.js"></script>
<!-- @endif -->
</head>
<body>
<!-- @ifdef DEBUG -->
<h1>Debugging mode - <!-- @echo RELEASE_TAG --> </h1>
<!-- @endif -->
<p>
<!-- @include welcome_message.txt -->
</p>
</body>var configValue = '/* @echo FOO */' || 'default value';
// @ifdef DEBUG
someDebuggingCall()
// @endifThe most basic usage is for files that only have two states, non-processed and processed.
In this case, your @exclude directives are removed after preprocessing
<body>
<!-- @exclude -->
<header>You're on dev!</header>
<!-- @endexclude -->
</body>After build
<body>
</body>@if VAR='value'/@endifThis will include the enclosed block if your test passes@ifdef VAR/@endifThis will include the enclosed block if VAR is defined (typeof !== 'undefined')@ifndef VAR/@endifThis will include the enclosed block if VAR is not defined (typeof === 'undefined')@includeThis will include the source from an external file@exclude/@endexcludeThis will remove the enclosed block upon processing@echo VARThis will include the environment variable VAR into your source
This is useful for more fine grained control of your files over multiple environment configurations. You have access to simple tests of any variable within the context (or ENV, if not supplied)
<body>
<!-- @if NODE_ENV!='production' -->
<header>You're on dev!</header>
<!-- @endif -->
<!-- @if NODE_ENV='production' -->
<script src="some/production/javascript.js"></script>
<!-- @endif -->
<script>
var fingerprint = '<!-- @echo COMMIT_HASH -->' || 'DEFAULT';
</script>
</body>With a NODE_ENV set to production and 0xDEADBEEF in
COMMIT_HASH this will be built to look like
<body>
<script src="some/production/javascript.js"></script>
<script>
var fingerprint = '0xDEADBEEF' || 'DEFAULT';
</script>
</body>With NODE_ENV not set or set to dev and nothing in COMMIT_HASH, the built file will be
<body>
<header>You're on dev!</header>
<script>
var fingerprint = '' || 'DEFAULT';
</script>
</body>Extended syntax below, but will work without specifying a test
normalFunction();
//@exclude
superExpensiveDebugFunction()
//@endexclude
'/* @echo USERNAME */'
anotherFunction();Built with a NODE_ENV of production :
normalFunction();
'jsoverson'
anotherFunction();CSS example
body {
/* @if NODE_ENV=='development' */
background-color: red;
/* @endif */
}
// @include util.css(CSS preprocessing supports single line comment style directives)
npreprocess inputFile [/out:outputFile] [/type:fileType] [/v:name=value]- Input file argument is required.
- If no output file is specified .processed. is generated.
- If no type specified than input file extension is used as type. Supported extensions are JS, HTML, HTM, XML, CSS, PHP, C, CPP, CS, JAVA
- 1.0.0 Initial release
Written by Ertan Tike, Ported from https://github.com/jsoverson/preprocess/ (Jarrod Overson)
Licensed under the Apache 2.0 license.